Cathodic protection system for a metallic structure



FIG. 1 is a plan view of the first embodiment of a cathodic protection system for a metallic structure, showing our new invention;

FIG. 2 is a plan view of the second embodiment of a cathodic protection system for a metallic structure thereof;

FIG. 3 is a plan view of the third embodiment of a cathodic protection system for a metallic structure thereof; and,

FIG. 4 is a plan view of the fourth embodiment of a cathodic protection system for a metallic structure thereof.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cathodic protection system for a metallic structure, as shown and described. 